Translators needed &gt; English to Spanish

We need spanish translators for translating several projects from english to spanish. One project is divided into around 34 chapters. 33 chapters contain 11 similar rewritten sentences. Chapter 34 contains 30 headlines.

Specs:

1. Size of one project - around 5000 words or 360 sentences

2. SEO character of the sentences must be preserved in target language (just altering 2 or 3 words here does not do the trick)

3. ##variables## and keywords don't need to be translated but need to be naturally included with the translated sentences

4. Some sentences contain mild adult language

Please, when bidding advise us with your price / project and also how many such projects you can translate for us weekly.

Project will be a long-term assignment for the chosen providers, so only serious hard-working people are welcomed to bid on this project!